Abstract: A tag or label includes first and second sheets having facing sides. A thin, flat, flexible device is disposed between the facing sides of the first and second sheets and has opposing flat surfaces meeting at a perimeter surrounding the device. An adhesive fixes the facing sides of the first and second sheets to the opposing flat surfaces of the device and to one another except in an adhesion-free region, where the adhesion-free region is a frame-shaped adhesion-free region surrounding the perimeter of the device or a polygon-shaped adhesion-free region inside the perimeter of the device.